Explanation for Question 46 From the Reading Section on the 2018 May Sat
Question number 46 asks in the context of the research described to the passage 2 type IIA supernova may be useful because they could allow astronomers to 3 what. So let's go back to our discussion of IAA supernova and the passage 4 to see what the application of studying the supernova is. 5 So looking at this paragraph here about the candles project, 6 we see that they are, the supernova are the best known standard candles for 7 measuring the universe has recent expansion, 8 right? So this expansion rate is really key. 9 Candles was designed to test whether the supernova are a valid yardstick 10 for the early universe. So it has to do with the expansion rate of 11 the early universe. Um, 12 and that lines up with answer choice a to 46. 13 I is our correct answer. Um, choice B measuring distance 14 is tempting because of that word yardstick that was used. 15 Um, however, in this case, yardstick is used sort of as like a benchmark 16 rather than a literal distance itself. 17 Um, see, understand what causes stars to explode. 18 Um, that's not really discussed this causation of exclusion, 19 not something referenced, um, choice D catalog, 20 the earliest known galaxies, according to their physical properties, 21 the supernova aren't, aren't useful for physical properties, 22 although that is discussed later in the passage, 23 the supernova themselves are really used for expansion, 24 right? Which is why I as our correct answer for 46.